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Protobuf v3.14.0 Release Notes

Release Date: 2020-11-13 // over 2 years ago

  • Protocol Compiler

    • The proto compiler no longer requires a .proto filename when it is not
      generating code.
    • ➕ Added flag --deterministic_output to protoc --encode=....
    • 🛠 Fixed deadlock when using google.protobuf.Any embedded in aggregate options.

    C++

    • Arenas are now unconditionally enabled. cc_enable_arenas no longer has
      any effect.
    • ✂ Removed inlined string support, which is incompatible with arenas.
    • 🛠 Fix a memory corruption bug in reflection when mixing optional and
      non-optional fields.
    • 👉 Make SpaceUsed() calculation more thorough for map fields.
    • ➕ Add stack overflow protection for text format with unknown field values.
    • 🚦 FieldPath::FollowAll() now returns a bool to signal if an out-of-bounds
      error was encountered.
    • 🐎 Performance improvements for Map.
    • Minor formatting fix when dumping a descriptor to .proto format with
      DebugString.
    • UBSAN fix in RepeatedField (#2073).
    • ✅ When running under ASAN, skip a test that makes huge allocations.
    • 🛠 Fixed a crash that could happen when creating more than 256 extensions in
      a single message.
    • 🛠 Fix a crash in BuildFile when passing in invalid descriptor proto.
    • 🔒 Parser security fix when operating with CodedInputStream.
    • Warn against the use of AllowUnknownExtension.
    • Migrated to C++11 for-range loops instead of index-based loops where
      ⚠ possible. This fixes a lot of warnings when compiling with -Wsign-compare.
    • 🛠 Fix segment fault for proto3 optional (#7805)
    • ➕ Adds a CMake option to build libprotoc separately (#7949)

    Java

    • 🛠 Bugfix in mergeFrom() when a oneof has multiple message fields.
    • 🛠 Fix RopeByteString.RopeInputStream.read() returning -1 when told to read
      0 bytes when not at EOF.
    • 🚚 Redefine remove(Object) on primitive repeated field Lists to avoid
      autoboxing.
    • 👌 Support "\u" escapes in textformat string literals.
    • Trailing empty spaces are no longer ignored for FieldMask.
    • 🛠 Fix FieldMaskUtil.subtract to recursively remove mask.
    • 🗄 Mark enums with @java.lang.Deprecated if the proto enum has option
      🗄 deprecated = true;.
    • ➕ Adding forgotten duration.proto to the lite library (#7738)

    Python

    • 🖨 Print google.protobuf.NullValue as null instead of "NULL_VALUE" when it is
      👉 used outside WKT Value/Struct.
    • 🛠 Fix bug occurring when attempting to deep copy an enum type in python 3.
    • ➕ Add a setuptools extension for generating Python protobufs (#7783)
    • ✂ Remove uses of pkg_resources in non-namespace packages. (#7902)
    • [bazel/py] Omit google/ init.py from the Protobuf runtime. (#7908)
    • ✂ Removed the unnecessary setuptools package dependency for Python package (#7511)
    • 🛠 Fix PyUnknownFields memory leak (#7928)

    PHP

    • ➕ Added support for "==" to the PHP C extension (#7883)
    • ➕ Added == operators for Map and Array. (#7900)
    • Native C well-known types (#7944)
    • ⚡️ Optimized away hex2bin() call in generated code (#8006)
    • 🆕 New version of upb, and a new hash function wyhash in third_party. (#8000)
    • ➕ add missing hasOneof method to check presence of oneof fields (#8003)

    Go

    • ⚡️ Update go_package options to reference google.golang.org/protobuf module.

    C

    • 🚑 annotate ByteString.CopyFrom(ReadOnlySpan) as SecuritySafeCritical (#7701)
    • 🛠 Fix C# optional field reflection when there are regular fields too (#7705)
    • 🛠 Fix parsing negative Int32Value that crosses segment boundary (#8035)

    Javascript

    • 📜 JS: parse (un)packed fields conditionally (#7379)